Fan attachment for swings.



T. W. CRABTREE.

FAN ATTACHMENT FOR SWINGS. APPLICATION FILED SEPT. 23, 1916.

Patented Sept. 4, 1917.

2 SHEETSSHEET I I I gw u'nfo z (51cm neg LW. CRABTREE.

FAN ATTACHMENT FOR SWINGS.

APPLICATION FILED SEPT. 23, I916.

LQQJLMD Patented mm; 4, 191?.

2 SHEETSSHEET 2.

awe-414214 ISAAC W. CRABTREE, 0F CAIRO, ILLINOIS.

FAN ATTAGHMENT FOB SWINGS.

Specification of Letters Patent.

Patented Sept. at, 1217.

Application filed September 2a, 1916. se ial No. 121,793.

To all whom it may concern.

. )e it known that I, IsAAc WV. C ABTREE, a

citizen of theUnite d States, residing at cient device readilyattachable to any swing and so constructed that theswinging movement ofthe swing proper gives constant revolution to the fan alwaysin the samedirection.

It has for a further object to provide efficient means for insuring easeof operation and avoiding damageto the mechanismby reason ofoverwrapping of the cords upon their drums. I

Other objects and advantages of the invention will hereinafter appearand the novel features thereof will be particularly pointed out in theappendedclaims.

The invention is clearly illustrated in. the accompanying drawings,which, with the numerals of reference marked thereon, form a part ofthis specification, and in which- Figure 1 is a side elevation, withportions broken away, of a lawn swing with my present improvementsapplied thereto.

7 Fig. 2 is a cross section, on the line 2-2 of Fig. 1, looking in thedirection of the arrows. y y

Fig. 3 is a diagrammatic view showing the swing moving in one direction.

Fig. 4 is a similar view showing the swing as moving in the oppositedirection.

Fig. 5 1s a sectional detail taken in line with the fan shaft, withparts broken away and parts shown in elevation.

Fig. 6 is a cross section on the line 6-6 of Fig. 7, looking in thedirection of the arrows.

Fig. 7 is a section on the line 7-7 of Fig. 6, looking in the directionof the arrows.

Like numerals of reference indicate like parts throughout the severalviews.

Referring to the drawings,

1, 1 designate the uprights or supports of the swing, of any ordinary orapproved form of construction, suitably braced to ive the assesses- .2are the pendent swinging uprights, two upon each side of theswi-ng, andpivotally mounted at their upper. ends, manner to the upper ends of thesupports 1, as shown clearly in Fig. 1. The platform, the seats and theside arms of the swing may be of any well-known or approved form ofconstruction and form no part of the present invention. y

. In addition to the cross braces 4 at the top, the supports 1 areadditionally braced by the transverse brace members 5 and secured tothese cross braces 5 at substantially their midlength are the bearings 6for a shaft 7. On thisshaftare loosely mounted the drums of spools 8,one near each end, andbetween these spools the fan blades 9 are affixedto the shaft. These blades may be of any well-known or preferred form ofconstruction attached to the shaft in any suitable manner.

Each spool 8 comprises a body portion with a flange IO at oneend againstwhich bears a washer 11, a cotter pin 12 passing through the shaft andengaging the washer and serving to limit the endwise movement of thespool on the shaft. The other end of the spool has an enlargement, asshown at 1.3, within which is a chamber 14, the inner wall of Whichisconstructed in the form of a clutch member having the curved camsurfaces 15, in the present instance shown as three in number, and theabrupt shoulders 1-6, of like number, as seen clearly in Fig. 6.Cooperating with these curved surfaces and abrupt shoulders is a pin 17loosely endwise movable through a transverse opening in the shaft 7 andengageable with the curved cam surfaces or the abrupt shouldersaccording to conditions.

i A plate .18 covers the outer Open end of this chamber, as seen best inFig. 7, the same being held in place by a cotter pin 19 or the likepassed transversely through the shaft.

The shaft 7 is mounted for limited endwise movement in its bearings,being limited in such movements by cotter pins or the like 20 passedtransversely through the shaft 7 adjacent the ends of the spools andbearings.

21 is a cord having a plurality of winds around the one spool 8 and itsopposite ends attached in any suitable manner, as at 22, to the opposedpendent members 2 upon one side of the swing. In the present instance Ihave sho n c mp 22 em ra g these m me as at 3, 3, in any suitable bers 2and having eye-bolts 24 with adjusting nuts 25 as a means of attachmentof the ends of the cord permitting adjustment.

when necessary.

26 is another cord wrapped a number of times around the opposite spool 8and having its ends attached, as .at 27, to thependent members 2 uponthat side of the swing, in the manner similar to the cords 21 upon theother side. I i With the parts constructed and arranged substantially ashereinbefore described, the operation is simple and will be readilyunderstood when taken in connection with the annexed drawings. Brieflystated, it is as follows: 1

As the platform 28 isswung back and forth, the cords 21 and 26 will bealternately wound upon and unwound from their respective spoolsand byreason of the clutch mechanism constituted by the slidable pin 17 andthe cam surfaces 15 and abrupt shoulders' 16 within the chamber 14 ofthe enlarged member 13 of each spool,the power is constant and the shaft7 and, consequently, the fan blades 9 will be continually revolved inthe same direction regardless of the direction in which the platform andthe pendent members 2 are moving. Attention is called to Figs. 3 and 4:in which I have shown diagrammatically the movement of the fan blades asbeing the same regardless of the direction of movement of the platform28 and the pendent members 2. It is to be noted that the cords 21 and 26are oppositely wound upon their spools, that is one is wound from thetop and the other from the bottom. As movement is given the swing,theone spool is revolved in one direction and the other spool isrevolvedin the opposite direction. During this movement the pini17 inthe chamber 14 of the one spool is out of engagement with the abruptshoulders 16, as indicated in Fig. 6. During this movement thepin17 inthe opposite spool is in engagement with the abrupt shoulders 16. Assoon as the platform and the pend.- ent members 2 are moved in theopposite direction, this action is reversed and the spools,

Copies of this patent may be obtained for consequently, moved inopposite directions and both in a direction opposite to that in whichthey were previously revolved. Thus I attain constant power and motionto at all times revolve the shaft '7 and, consequently, the fan bladesalways in the same direction, theclutch members automatically reversingthemselves as the direction of movement of the pendent members 2 isreversed.

The freedom of movement endwise of the shaft 7 permits the cords 21 and26 to at all times wind properly upon their spools, avoiding anypossibility of over-wrapping and consequent binding which would tend tointerfere with the proper operation of the parts. I

Modifications in details may be resorted to without departing from thespirit of the invention or sacrificing any of its advantages I g V [Whatis claimed as new is 1. In a fan attachment for swings, pendent swingmembers, a transverse fan shaft,

spools loosely mounted on said shaft one near each end, flexibleconnections between said pendent members and spools "adapted to beoppositely wound upon the latter, and clutch mechanism cooperating withsaid spools to give constant revolution to said shaft in one direction,said shaft being mounted for endwise movement in its bearm s.

2. In a fan attachment for swings, pendent swing members, a transversefan shaft endwlse movable 1n its be arlngs, spools loosely mounted onsaid 'shaft,,a cord connected to opposite'pendent members at one side ofthe swing and wound uponthe adjaoent spool, a cord connected with thependent members upon the opposite side of the swingand woundin anopposite direction upon the adjacent spool, and automatically reversibleclutch mechanism cooperating with said spools and oppositely dispose'dtogive constant revolution to the fan shaft in one direction regardless ofthe direction of movement of said pendent members.

In testimony whereof I'aflix my signature.

H 7 ISAAO'W, CRABTREE.

five cents each, by addressing the Commissioner of l 'atents,.Washington, D. C.

